Dynamically balance and angular momentum

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SUMMARY

The discussion centers on the concepts of torque and angular momentum in the context of rotating masses. The user identifies a discrepancy between their understanding and the information presented in the Wikipedia article, specifically regarding the direction of torque and angular momentum. The user concludes that the angular momentum of a rotating shaft with attached weights points southeast, while the torque is perceived as clockwise, contradicting the article's assertion of counterclockwise torque. This highlights the need for clarity in understanding the relationship between torque and angular momentum in rotational dynamics.

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  • Familiarity with torque and its role in rotational motion
  • Basic knowledge of centrifugal force and its effects on rotating bodies
  • Ability to interpret diagrams related to rotational dynamics
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  • Study the principles of torque and angular momentum in detail
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sgh1324
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https://en.wikipedia.org/wiki/Balancing_of_rotating_masses

See the image in that page.

I know intuitively why a direction of torque is counterclockwise-because of a centrifugal force.

But an direction of angular momentum of that shaft with attached weights (ignore the shaft mass) is southeast direction.

And a torque of that body is an inward of page, which means clockwise direction.

Why I gets this conclusion? somebody help me.
 
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It is not clear what you are trying to calculate from what, how?
What is your reasoning?

Some notes:
angular momentum points along the rotation axis
torque is rate of change of angular momentum ...
 
the direction of angular momentum of that body is southeast direction.

and because of rotation, angular momentum rotates inward direction of page.

so, that means direction of torque(=chage of angular momentum) is clockwise.

but the wiki page said that the torque's direction is counterclockwise.

i can't understand wiki conclusion by reasoning - torque direction is clockwise.ps from note
angular momentum points along the rotation axis - you means that shaft?
 

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